Confirming earlier rumors, BioWare's Ray Muzika appeared on stage during the Microsoft press briefing to announce that the Xbox 360 version of Mass Effect 3 will support Kinect, in the form of voice commands.
The brief demo showed voice support for dialogue trees and combat commands. The player would say the dialogue prompt (rather than selecting it) and then have Shepard say his line of dialogue. In battle, Shepard told his forces to move and execute biotics with voice recognition. Muzika promised more ME3 details to come during the EA press briefing.
The conference is still underway, Shacknews will update this post as more information is made available.